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Breakage behaviour of sand particles in point-load compression

Wang, W; Coop, MR; (2018) Breakage behaviour of sand particles in point-load compression. Géotechnique Letters , 8 (1) pp. 61-65. 10.1680/jgele.17.00155. Green open access

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Abstract

Single-particle uniaxial compression tests are generally conducted for sands by compressing a grain between two flat platens. However, previous work has shown that due to the complex morphology of natural sands the nature of their contacts with the loading platens can influence their strength. A custom-built apparatus was therefore built to apply point loading to sand particles. Using a high-speed camera, typical failure modes were observed, which showed less variability than those seen in platen-mounted tests with most undergoing some form of splitting. The particle strength under point loading also tended to be lower than for platen loading, and again with less variability. If the point-loading tests were compared with platen-loading tests for a similar splitting breakage mode, then the strength distributions were very similar. A possible explanation is that the platen-loading tests that underwent a splitting failure were the more angular particles, and so the effect of stress concentration might be similar to that for the point-loading tests.

Type: Article
Title: Breakage behaviour of sand particles in point-load compression
Open access status: An open access version is available from UCL Discovery
DOI: 10.1680/jgele.17.00155
Publisher version: https://doi.org/10.1680/jgele.17.00155
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10040987
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